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M41T82 Datenblatt(PDF) 31 Page - STMicroelectronics

Teilenummer M41T82
Bauteilbeschribung  Serial I2C bus RTC with battery switchover
PDF  58 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T82 Datenblatt(HTML) 31 Page - STMicroelectronics

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M41T82 M41T83
Clock operation
31/58
Figure 17.
Crystal accuracy across temperature
Table 7.
Analog calibration values
Addr
Analog
calibration
value
D7
D6
D5
D4
D3
D2
D1
D0
CXI,
CXO
CLOAD
(1)
1.
CLOAD = 1/(1/CXI + 1/CXO)
ACS
(±)
AC6
(16pF)
AC5
(8pF)
AC4
(4pF)
AC3
(2pF)
AC2
(1pF)
AC1
(0.5pF)
AC0
(0.25pF)
½(CXI, CXO)
12h
0pF
x
0
0
0
0
0
0
0
25pF
12.5pF
3pF
0
0
0
0
1
1
0
0
28pF
14pF
5pF
0
0
0
1
0
1
0
0
30pF
15pF
–7pF
1
0
0
1
1
1
0
0
18pF
9pF
9.75pF(2))
2.
Maximum negative calibration value
0
0
1
0
0
1
1
1
34.75pF
17.4pF
–18pF(3)
3.
Maximum positive calibration value
1
1
0
0
1
0
0
0
7pF
3.5pF
AI07888
–160
0
10203040506070
Frequency (ppm)
Temperature
°C
80
–10
–20
–30
–40
–100
–120
–140
–40
–60
–80
20
0
–20
= –0.036 ppm/
°C
2 ± 0.006 ppm/°C2
K
ΔF
= K x (T – T
O)
2
F
T
O = 25°C ± 5°C



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